地理科学 ›› 1986, Vol. 6 ›› Issue (1): 34-40.doi: 10.13249/j.cnki.sgs.1986.01.34

• 论文 • 上一篇    下一篇

中国海涂资源的开发利用问题

朱大奎   

  1. 南京大学海洋地貌与沉积研究室
  • 出版日期:1986-01-20 发布日期:1986-01-20

THE UTLLIZATION OF COASTAL MUDFLAT OF CHINA

Zhu Dakuin   

  1. Marine Geomorphology and Sedimentology Laboratory, Nanjing University
  • Online:1986-01-20 Published:1986-01-20

摘要: 本文把淤泥质海岸潮间浅滩定义为海涂,在中国,主要有平原型与港湾型两类.文中以江苏为例,根据海涂的特征与发育阶段,把平原型海涂划分为四类,并分述了各类型的特点及其利用方向,对中国海涂的开发利用提出了战略目标与政策.

Abstract: Most of 2000 km of intertidal mudflat on the chinese coastline is developed in the mesotidal Bohai sea and Yellow sea,along the great plain of north China and to the north of Hangzhou Bay. The coast slopes are very gentle with gradients of 1:1000 to 1:5000, thus,tidal currents play a major role in shapping the coast.The sediment consists of silt and clay to form extensive intertidal mudflats with the width normally 4 to 6 km,and the mudflats are up to 20km wide at the delta, The mudflats of Jiangsu are divided into four zones.(1)Supratidal zone (grass flats).It is marsh and the location is over the spring high tidal level. The sediment is very thin laimina mud-fine silt and marsh deposit.(2)Mudflat.which is located between spring high tidal level and mean high tidal level,and consists of lamina and thin alternating laimina of silt and mud. (3)Mud-Sand fiats.They are located between mean high tidal level and middle tidal level,and consist of mudium laimina with cross-bedding.They are many.(4)Silt-Sand flats with the wave ripples surface acted by wave action. The mudflats are potential resources of farm land,especially for east part of China where over heavy population is.However,they are also good for developing salt fields,coastal lashing,other aquatic resources,and even there are many locations to be suitable for building harbor.For most part of inner two zone of mudflat,i.e.above mean HTL,and land-ward to the salt marsh can be reclaimated for developing agriculture,the lower two zones of mudflat are ideal ground for accumulating Shell fish such as Meretrix,Cyolina Sinensis etc..It has greater economic value than reclamation. The mudflat coast represents a dynamic balance between wave erosion and deposition of unconsolidated sediment supplied principally by larger river,shch as Yellow River and Yangtze River.Thus,any engineering project related to the coast or river mouth there will cause a series of problems.We do need more regional planning and marine legislation to strengthen the coast management.